1#include <linux/sysdev.h>
2#include <linux/cpu.h>
3#include <linux/smp.h>
4#include <linux/percpu.h>
5#include <linux/init.h>
6#include <linux/sched.h>
7#include <linux/export.h>
8#include <linux/nodemask.h>
9#include <linux/cpumask.h>
10#include <linux/notifier.h>
11
12#include <asm/current.h>
13#include <asm/processor.h>
14#include <asm/cputable.h>
15#include <asm/firmware.h>
16#include <asm/hvcall.h>
17#include <asm/prom.h>
18#include <asm/machdep.h>
19#include <asm/smp.h>
20#include <asm/pmc.h>
21
22#include "cacheinfo.h"
23
24#ifdef CONFIG_PPC64
25#include <asm/paca.h>
26#include <asm/lppaca.h>
27#endif
28
29static DEFINE_PER_CPU(struct cpu, cpu_devices);
30
31
32
33
34
35#ifdef CONFIG_PPC64
36
37
38DEFINE_PER_CPU(long, smt_snooze_delay) = { 100 };
39
40static ssize_t store_smt_snooze_delay(struct sys_device *dev,
41 struct sysdev_attribute *attr,
42 const char *buf,
43 size_t count)
44{
45 struct cpu *cpu = container_of(dev, struct cpu, sysdev);
46 ssize_t ret;
47 long snooze;
48
49 ret = sscanf(buf, "%ld", &snooze);
50 if (ret != 1)
51 return -EINVAL;
52
53 per_cpu(smt_snooze_delay, cpu->sysdev.id) = snooze;
54
55 return count;
56}
57
58static ssize_t show_smt_snooze_delay(struct sys_device *dev,
59 struct sysdev_attribute *attr,
60 char *buf)
61{
62 struct cpu *cpu = container_of(dev, struct cpu, sysdev);
63
64 return sprintf(buf, "%ld\n", per_cpu(smt_snooze_delay, cpu->sysdev.id));
65}
66
67static SYSDEV_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay,
68 store_smt_snooze_delay);
69
70static int __init setup_smt_snooze_delay(char *str)
71{
72 unsigned int cpu;
73 long snooze;
74
75 if (!cpu_has_feature(CPU_FTR_SMT))
76 return 1;
77
78 snooze = simple_strtol(str, NULL, 10);
79 for_each_possible_cpu(cpu)
80 per_cpu(smt_snooze_delay, cpu) = snooze;
81
82 return 1;
83}
84__setup("smt-snooze-delay=", setup_smt_snooze_delay);
85
86#endif
87
88
89
90
91
92
93static DEFINE_PER_CPU(char, pmcs_enabled);
94
95void ppc_enable_pmcs(void)
96{
97 ppc_set_pmu_inuse(1);
98
99
100 if (__get_cpu_var(pmcs_enabled))
101 return;
102
103 __get_cpu_var(pmcs_enabled) = 1;
104
105 if (ppc_md.enable_pmcs)
106 ppc_md.enable_pmcs();
107}
108EXPORT_SYMBOL(ppc_enable_pmcs);
109
110#define SYSFS_PMCSETUP(NAME, ADDRESS) \
111static void read_##NAME(void *val) \
112{ \
113 *(unsigned long *)val = mfspr(ADDRESS); \
114} \
115static void write_##NAME(void *val) \
116{ \
117 ppc_enable_pmcs(); \
118 mtspr(ADDRESS, *(unsigned long *)val); \
119} \
120static ssize_t show_##NAME(struct sys_device *dev, \
121 struct sysdev_attribute *attr, \
122 char *buf) \
123{ \
124 struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
125 unsigned long val; \
126 smp_call_function_single(cpu->sysdev.id, read_##NAME, &val, 1); \
127 return sprintf(buf, "%lx\n", val); \
128} \
129static ssize_t __used \
130 store_##NAME(struct sys_device *dev, struct sysdev_attribute *attr, \
131 const char *buf, size_t count) \
132{ \
133 struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
134 unsigned long val; \
135 int ret = sscanf(buf, "%lx", &val); \
136 if (ret != 1) \
137 return -EINVAL; \
138 smp_call_function_single(cpu->sysdev.id, write_##NAME, &val, 1); \
139 return count; \
140}
141
142
143
144
145
146
147#if defined(CONFIG_PPC64)
148#define HAS_PPC_PMC_CLASSIC 1
149#define HAS_PPC_PMC_IBM 1
150#define HAS_PPC_PMC_PA6T 1
151#elif defined(CONFIG_6xx)
152#define HAS_PPC_PMC_CLASSIC 1
153#define HAS_PPC_PMC_IBM 1
154#define HAS_PPC_PMC_G4 1
155#endif
156
157
158#ifdef HAS_PPC_PMC_CLASSIC
159SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
160SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
161SYSFS_PMCSETUP(pmc1, SPRN_PMC1);
162SYSFS_PMCSETUP(pmc2, SPRN_PMC2);
163SYSFS_PMCSETUP(pmc3, SPRN_PMC3);
164SYSFS_PMCSETUP(pmc4, SPRN_PMC4);
165SYSFS_PMCSETUP(pmc5, SPRN_PMC5);
166SYSFS_PMCSETUP(pmc6, SPRN_PMC6);
167
168#ifdef HAS_PPC_PMC_G4
169SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2);
170#endif
171
172#ifdef CONFIG_PPC64
173SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
174SYSFS_PMCSETUP(pmc8, SPRN_PMC8);
175
176SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
177SYSFS_PMCSETUP(purr, SPRN_PURR);
178SYSFS_PMCSETUP(spurr, SPRN_SPURR);
179SYSFS_PMCSETUP(dscr, SPRN_DSCR);
180
181static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
182static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL);
183static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr);
184static SYSDEV_ATTR(purr, 0600, show_purr, store_purr);
185
186unsigned long dscr_default = 0;
187EXPORT_SYMBOL(dscr_default);
188
189static ssize_t show_dscr_default(struct sysdev_class *class,
190 struct sysdev_class_attribute *attr, char *buf)
191{
192 return sprintf(buf, "%lx\n", dscr_default);
193}
194
195static ssize_t __used store_dscr_default(struct sysdev_class *class,
196 struct sysdev_class_attribute *attr, const char *buf,
197 size_t count)
198{
199 unsigned long val;
200 int ret = 0;
201
202 ret = sscanf(buf, "%lx", &val);
203 if (ret != 1)
204 return -EINVAL;
205 dscr_default = val;
206
207 return count;
208}
209
210static SYSDEV_CLASS_ATTR(dscr_default, 0600,
211 show_dscr_default, store_dscr_default);
212
213static void sysfs_create_dscr_default(void)
214{
215 int err = 0;
216 if (cpu_has_feature(CPU_FTR_DSCR))
217 err = sysfs_create_file(&cpu_sysdev_class.kset.kobj,
218 &attr_dscr_default.attr);
219}
220#endif
221
222#ifdef HAS_PPC_PMC_PA6T
223SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);
224SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);
225SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);
226SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);
227SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);
228SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);
229#ifdef CONFIG_DEBUG_KERNEL
230SYSFS_PMCSETUP(hid0, SPRN_HID0);
231SYSFS_PMCSETUP(hid1, SPRN_HID1);
232SYSFS_PMCSETUP(hid4, SPRN_HID4);
233SYSFS_PMCSETUP(hid5, SPRN_HID5);
234SYSFS_PMCSETUP(ima0, SPRN_PA6T_IMA0);
235SYSFS_PMCSETUP(ima1, SPRN_PA6T_IMA1);
236SYSFS_PMCSETUP(ima2, SPRN_PA6T_IMA2);
237SYSFS_PMCSETUP(ima3, SPRN_PA6T_IMA3);
238SYSFS_PMCSETUP(ima4, SPRN_PA6T_IMA4);
239SYSFS_PMCSETUP(ima5, SPRN_PA6T_IMA5);
240SYSFS_PMCSETUP(ima6, SPRN_PA6T_IMA6);
241SYSFS_PMCSETUP(ima7, SPRN_PA6T_IMA7);
242SYSFS_PMCSETUP(ima8, SPRN_PA6T_IMA8);
243SYSFS_PMCSETUP(ima9, SPRN_PA6T_IMA9);
244SYSFS_PMCSETUP(imaat, SPRN_PA6T_IMAAT);
245SYSFS_PMCSETUP(btcr, SPRN_PA6T_BTCR);
246SYSFS_PMCSETUP(pccr, SPRN_PA6T_PCCR);
247SYSFS_PMCSETUP(rpccr, SPRN_PA6T_RPCCR);
248SYSFS_PMCSETUP(der, SPRN_PA6T_DER);
249SYSFS_PMCSETUP(mer, SPRN_PA6T_MER);
250SYSFS_PMCSETUP(ber, SPRN_PA6T_BER);
251SYSFS_PMCSETUP(ier, SPRN_PA6T_IER);
252SYSFS_PMCSETUP(sier, SPRN_PA6T_SIER);
253SYSFS_PMCSETUP(siar, SPRN_PA6T_SIAR);
254SYSFS_PMCSETUP(tsr0, SPRN_PA6T_TSR0);
255SYSFS_PMCSETUP(tsr1, SPRN_PA6T_TSR1);
256SYSFS_PMCSETUP(tsr2, SPRN_PA6T_TSR2);
257SYSFS_PMCSETUP(tsr3, SPRN_PA6T_TSR3);
258#endif
259#endif
260
261#ifdef HAS_PPC_PMC_IBM
262static struct sysdev_attribute ibm_common_attrs[] = {
263 _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
264 _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
265};
266#endif
267
268#ifdef HAS_PPC_PMC_G4
269static struct sysdev_attribute g4_common_attrs[] = {
270 _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
271 _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
272 _SYSDEV_ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2),
273};
274#endif
275
276static struct sysdev_attribute classic_pmc_attrs[] = {
277 _SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1),
278 _SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2),
279 _SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3),
280 _SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4),
281 _SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5),
282 _SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6),
283#ifdef CONFIG_PPC64
284 _SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7),
285 _SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8),
286#endif
287};
288
289#ifdef HAS_PPC_PMC_PA6T
290static struct sysdev_attribute pa6t_attrs[] = {
291 _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
292 _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
293 _SYSDEV_ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0),
294 _SYSDEV_ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1),
295 _SYSDEV_ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2),
296 _SYSDEV_ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3),
297 _SYSDEV_ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4),
298 _SYSDEV_ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5),
299#ifdef CONFIG_DEBUG_KERNEL
300 _SYSDEV_ATTR(hid0, 0600, show_hid0, store_hid0),
301 _SYSDEV_ATTR(hid1, 0600, show_hid1, store_hid1),
302 _SYSDEV_ATTR(hid4, 0600, show_hid4, store_hid4),
303 _SYSDEV_ATTR(hid5, 0600, show_hid5, store_hid5),
304 _SYSDEV_ATTR(ima0, 0600, show_ima0, store_ima0),
305 _SYSDEV_ATTR(ima1, 0600, show_ima1, store_ima1),
306 _SYSDEV_ATTR(ima2, 0600, show_ima2, store_ima2),
307 _SYSDEV_ATTR(ima3, 0600, show_ima3, store_ima3),
308 _SYSDEV_ATTR(ima4, 0600, show_ima4, store_ima4),
309 _SYSDEV_ATTR(ima5, 0600, show_ima5, store_ima5),
310 _SYSDEV_ATTR(ima6, 0600, show_ima6, store_ima6),
311 _SYSDEV_ATTR(ima7, 0600, show_ima7, store_ima7),
312 _SYSDEV_ATTR(ima8, 0600, show_ima8, store_ima8),
313 _SYSDEV_ATTR(ima9, 0600, show_ima9, store_ima9),
314 _SYSDEV_ATTR(imaat, 0600, show_imaat, store_imaat),
315 _SYSDEV_ATTR(btcr, 0600, show_btcr, store_btcr),
316 _SYSDEV_ATTR(pccr, 0600, show_pccr, store_pccr),
317 _SYSDEV_ATTR(rpccr, 0600, show_rpccr, store_rpccr),
318 _SYSDEV_ATTR(der, 0600, show_der, store_der),
319 _SYSDEV_ATTR(mer, 0600, show_mer, store_mer),
320 _SYSDEV_ATTR(ber, 0600, show_ber, store_ber),
321 _SYSDEV_ATTR(ier, 0600, show_ier, store_ier),
322 _SYSDEV_ATTR(sier, 0600, show_sier, store_sier),
323 _SYSDEV_ATTR(siar, 0600, show_siar, store_siar),
324 _SYSDEV_ATTR(tsr0, 0600, show_tsr0, store_tsr0),
325 _SYSDEV_ATTR(tsr1, 0600, show_tsr1, store_tsr1),
326 _SYSDEV_ATTR(tsr2, 0600, show_tsr2, store_tsr2),
327 _SYSDEV_ATTR(tsr3, 0600, show_tsr3, store_tsr3),
328#endif
329};
330#endif
331#endif
332
333static void __cpuinit register_cpu_online(unsigned int cpu)
334{
335 struct cpu *c = &per_cpu(cpu_devices, cpu);
336 struct sys_device *s = &c->sysdev;
337 struct sysdev_attribute *attrs, *pmc_attrs;
338 int i, nattrs;
339
340#ifdef CONFIG_PPC64
341 if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
342 cpu_has_feature(CPU_FTR_SMT))
343 sysdev_create_file(s, &attr_smt_snooze_delay);
344#endif
345
346
347 switch (cur_cpu_spec->pmc_type) {
348#ifdef HAS_PPC_PMC_IBM
349 case PPC_PMC_IBM:
350 attrs = ibm_common_attrs;
351 nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
352 pmc_attrs = classic_pmc_attrs;
353 break;
354#endif
355#ifdef HAS_PPC_PMC_G4
356 case PPC_PMC_G4:
357 attrs = g4_common_attrs;
358 nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);
359 pmc_attrs = classic_pmc_attrs;
360 break;
361#endif
362#ifdef HAS_PPC_PMC_PA6T
363 case PPC_PMC_PA6T:
364
365 attrs = pa6t_attrs;
366 nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
367 pmc_attrs = NULL;
368 break;
369#endif
370 default:
371 attrs = NULL;
372 nattrs = 0;
373 pmc_attrs = NULL;
374 }
375
376 for (i = 0; i < nattrs; i++)
377 sysdev_create_file(s, &attrs[i]);
378
379 if (pmc_attrs)
380 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
381 sysdev_create_file(s, &pmc_attrs[i]);
382
383#ifdef CONFIG_PPC64
384 if (cpu_has_feature(CPU_FTR_MMCRA))
385 sysdev_create_file(s, &attr_mmcra);
386
387 if (cpu_has_feature(CPU_FTR_PURR))
388 sysdev_create_file(s, &attr_purr);
389
390 if (cpu_has_feature(CPU_FTR_SPURR))
391 sysdev_create_file(s, &attr_spurr);
392
393 if (cpu_has_feature(CPU_FTR_DSCR))
394 sysdev_create_file(s, &attr_dscr);
395#endif
396
397 cacheinfo_cpu_online(cpu);
398}
399
400#ifdef CONFIG_HOTPLUG_CPU
401static void unregister_cpu_online(unsigned int cpu)
402{
403 struct cpu *c = &per_cpu(cpu_devices, cpu);
404 struct sys_device *s = &c->sysdev;
405 struct sysdev_attribute *attrs, *pmc_attrs;
406 int i, nattrs;
407
408 BUG_ON(!c->hotpluggable);
409
410#ifdef CONFIG_PPC64
411 if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
412 cpu_has_feature(CPU_FTR_SMT))
413 sysdev_remove_file(s, &attr_smt_snooze_delay);
414#endif
415
416
417 switch (cur_cpu_spec->pmc_type) {
418#ifdef HAS_PPC_PMC_IBM
419 case PPC_PMC_IBM:
420 attrs = ibm_common_attrs;
421 nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
422 pmc_attrs = classic_pmc_attrs;
423 break;
424#endif
425#ifdef HAS_PPC_PMC_G4
426 case PPC_PMC_G4:
427 attrs = g4_common_attrs;
428 nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);
429 pmc_attrs = classic_pmc_attrs;
430 break;
431#endif
432#ifdef HAS_PPC_PMC_PA6T
433 case PPC_PMC_PA6T:
434
435 attrs = pa6t_attrs;
436 nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
437 pmc_attrs = NULL;
438 break;
439#endif
440 default:
441 attrs = NULL;
442 nattrs = 0;
443 pmc_attrs = NULL;
444 }
445
446 for (i = 0; i < nattrs; i++)
447 sysdev_remove_file(s, &attrs[i]);
448
449 if (pmc_attrs)
450 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
451 sysdev_remove_file(s, &pmc_attrs[i]);
452
453#ifdef CONFIG_PPC64
454 if (cpu_has_feature(CPU_FTR_MMCRA))
455 sysdev_remove_file(s, &attr_mmcra);
456
457 if (cpu_has_feature(CPU_FTR_PURR))
458 sysdev_remove_file(s, &attr_purr);
459
460 if (cpu_has_feature(CPU_FTR_SPURR))
461 sysdev_remove_file(s, &attr_spurr);
462
463 if (cpu_has_feature(CPU_FTR_DSCR))
464 sysdev_remove_file(s, &attr_dscr);
465#endif
466
467 cacheinfo_cpu_offline(cpu);
468}
469
470#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
471ssize_t arch_cpu_probe(const char *buf, size_t count)
472{
473 if (ppc_md.cpu_probe)
474 return ppc_md.cpu_probe(buf, count);
475
476 return -EINVAL;
477}
478
479ssize_t arch_cpu_release(const char *buf, size_t count)
480{
481 if (ppc_md.cpu_release)
482 return ppc_md.cpu_release(buf, count);
483
484 return -EINVAL;
485}
486#endif
487
488#endif
489
490static int __cpuinit sysfs_cpu_notify(struct notifier_block *self,
491 unsigned long action, void *hcpu)
492{
493 unsigned int cpu = (unsigned int)(long)hcpu;
494
495 switch (action) {
496 case CPU_ONLINE:
497 case CPU_ONLINE_FROZEN:
498 register_cpu_online(cpu);
499 break;
500#ifdef CONFIG_HOTPLUG_CPU
501 case CPU_DEAD:
502 case CPU_DEAD_FROZEN:
503 unregister_cpu_online(cpu);
504 break;
505#endif
506 }
507 return NOTIFY_OK;
508}
509
510static struct notifier_block __cpuinitdata sysfs_cpu_nb = {
511 .notifier_call = sysfs_cpu_notify,
512};
513
514static DEFINE_MUTEX(cpu_mutex);
515
516int cpu_add_sysdev_attr(struct sysdev_attribute *attr)
517{
518 int cpu;
519
520 mutex_lock(&cpu_mutex);
521
522 for_each_possible_cpu(cpu) {
523 sysdev_create_file(get_cpu_sysdev(cpu), attr);
524 }
525
526 mutex_unlock(&cpu_mutex);
527 return 0;
528}
529EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr);
530
531int cpu_add_sysdev_attr_group(struct attribute_group *attrs)
532{
533 int cpu;
534 struct sys_device *sysdev;
535 int ret;
536
537 mutex_lock(&cpu_mutex);
538
539 for_each_possible_cpu(cpu) {
540 sysdev = get_cpu_sysdev(cpu);
541 ret = sysfs_create_group(&sysdev->kobj, attrs);
542 WARN_ON(ret != 0);
543 }
544
545 mutex_unlock(&cpu_mutex);
546 return 0;
547}
548EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr_group);
549
550
551void cpu_remove_sysdev_attr(struct sysdev_attribute *attr)
552{
553 int cpu;
554
555 mutex_lock(&cpu_mutex);
556
557 for_each_possible_cpu(cpu) {
558 sysdev_remove_file(get_cpu_sysdev(cpu), attr);
559 }
560
561 mutex_unlock(&cpu_mutex);
562}
563EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr);
564
565void cpu_remove_sysdev_attr_group(struct attribute_group *attrs)
566{
567 int cpu;
568 struct sys_device *sysdev;
569
570 mutex_lock(&cpu_mutex);
571
572 for_each_possible_cpu(cpu) {
573 sysdev = get_cpu_sysdev(cpu);
574 sysfs_remove_group(&sysdev->kobj, attrs);
575 }
576
577 mutex_unlock(&cpu_mutex);
578}
579EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr_group);
580
581
582
583
584#ifdef CONFIG_NUMA
585static void register_nodes(void)
586{
587 int i;
588
589 for (i = 0; i < MAX_NUMNODES; i++)
590 register_one_node(i);
591}
592
593int sysfs_add_device_to_node(struct sys_device *dev, int nid)
594{
595 struct node *node = &node_devices[nid];
596 return sysfs_create_link(&node->sysdev.kobj, &dev->kobj,
597 kobject_name(&dev->kobj));
598}
599EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
600
601void sysfs_remove_device_from_node(struct sys_device *dev, int nid)
602{
603 struct node *node = &node_devices[nid];
604 sysfs_remove_link(&node->sysdev.kobj, kobject_name(&dev->kobj));
605}
606EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
607
608#else
609static void register_nodes(void)
610{
611 return;
612}
613
614#endif
615
616
617static ssize_t show_physical_id(struct sys_device *dev,
618 struct sysdev_attribute *attr, char *buf)
619{
620 struct cpu *cpu = container_of(dev, struct cpu, sysdev);
621
622 return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->sysdev.id));
623}
624static SYSDEV_ATTR(physical_id, 0444, show_physical_id, NULL);
625
626static int __init topology_init(void)
627{
628 int cpu;
629
630 register_nodes();
631 register_cpu_notifier(&sysfs_cpu_nb);
632
633 for_each_possible_cpu(cpu) {
634 struct cpu *c = &per_cpu(cpu_devices, cpu);
635
636
637
638
639
640
641
642
643 if (ppc_md.cpu_die)
644 c->hotpluggable = 1;
645
646 if (cpu_online(cpu) || c->hotpluggable) {
647 register_cpu(c, cpu);
648
649 sysdev_create_file(&c->sysdev, &attr_physical_id);
650 }
651
652 if (cpu_online(cpu))
653 register_cpu_online(cpu);
654 }
655#ifdef CONFIG_PPC64
656 sysfs_create_dscr_default();
657#endif
658
659 return 0;
660}
661subsys_initcall(topology_init);
662
